Air-feeding device



(No Model.)

J. BURNS.

AIR FEEDING DEVICE.

Patented June 3, 1890.

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JOHN BURNS, OF CHICAGO, ILLINOIS.

AIR-FEEDING DEVICE.

srncxnronrxon forming part of Letters Patent No. 429,228, dated June 3,1890.

I Application filed January 22, 1890. Serial No. 337,676. (No model.)

To all whom it may concern:

Be it known that I, JOHN Bonus, a citizen of the United States, residingat Chicago, in the county of Cool; and State of Illinois, have inventeda new and useful Air-Feeding Device, of which the following is aspecification.

Thisinvention has relation to improvements in locomotives, the objectsin view being to prevent the entrance of snow, ice, and sleet into theash-pan together with cold air, whereby a reduction of temperatureresults, to aid combustion, and intensify the heat rising from thefire-box.

With these general objects in view the invention consists in a cylinderinclosing the smoke-box of the locomotive and having its front end openand projecting beyond the end of the smoke-box to induce air to entertherein, in pipes leading from the cylinder to the ashpan and to anair-chamber located at the side of the fire-box, and in a series oftubes communicating with the interior of the fire-box and the chamber.

The invention consists in other features of construction, hereinafterspecified, and particularly pointed out in the claims.

Referring to 'the drawings, Figure 1 is a side elevation of a locomotiveprovided with my improvement. Fig. 2 is a front elevation of the same;Fig. 3, a transverse section on the line through the fire-box.

Like numerals of reference indicate like parts in all the figures of thedrawings.

1 represents the boiler of the locomotive, which is of the usualconstruction, 2 the smokechamber, and 3 the fire-box, and under thelatter is located the imperforate ash-pan 4:. The walls of the fire-boxare perforated or provided with opposite openings 5, and extending fromone to the other are tubes or cylinders 6, (in this instance three innumber,) at each side of the fire-box, the tubes terminating at theirinner ends above the fire-bed. The outer ends of the cylinders arecovered by a longitudinally-disposed box or chamber 7, and the innerends of the tubes are preferably provided with perforated diaphragms 8.

The smoke-box 2 of the locomotive is encircled by a cylinder 9,preferably formed of sheet metal and arranged eccentric with thesmoke-box, the outer edge of the cylinder projecting beyond the smokeboxand havingits intermediate space covered partially by a curved rim orplate 10. By the provision of the cylinder an air-induction chamber 11is provided, and as the cylinder is closed at the rear end and snuglyfits the boiler-casing, as at 12, the air will form a cushion within thechamber 11, as will be readily apparent. The rim or plate 10 fits andpartially closes the front of the space or chamber 11, there remainingafter the rim or plate is in position an induction-opening 10*, throughwhich air enters the chamber 11. From each side of the cylinder thereleads to the rear an air-pipe 13, which communicates with the interiorchamber at its front end and at its rear end terminates in thelongitudinal box or airchamber 7, that covers the outer ends'of thesmall air-cylinder. From each of the chambers or boxes there depends anair-pipe 14, the lower end of which extends into the im-= perforateash-pan, thus opening communication from the ash-pan to the air-chamberand from the air-chamber to the air-receiving cylinder. The smoke andproducts of combustion passing into the smoke-box tends to heat the airwithin the receiving-chamber, and the same passes off at its warmestpoint through the air-pipes into the air-chambers at the sides of thefire-box, where it is fed over the fire and into the box, the remainingportion of the air passing through the depending pipes and into theash-pan, where it is diffused and passes up through the grate to givedraft to the fire. In this manner the fire-box is constantly fed withpartially-warmed air, which induces combustion and intensifies the heatwithout reducing the temperature of the fire-box by the admission ofcold air through openings in the ash-pan, together with sleet, rain, &c.

Having described my invention, what I claim is l. The combination, witha locomotive, its fire-box, and an imperforate ash-pan, of anair-receiving chamber located at the front end of the locomotive,opposite air-chambers secured to the sides of the fire-box and communicating therewith, and opposite pipes leading from the air-receiver tothe air-chambers and from the air-chambers to the fire-box,substantially as specified.

2. The combination, with the locomotive having a fire-box provided withdouble walls,

Ice

of cylinders connecting the walls and provided with perforateddiaphragms, boxes forming chambers secured to the sides of the fire-boxand covering the outer ends of the cylinders, an air-receiving chamberlocated at the front end of the locomotive, and opposite pipes leadingfrom the chamber and communicating with the air-chambers of thefire-box, substantially as specified.

3. The combination, with the locomotive and its fire-box, of aconcentrically-arranged cylinder 9, inclosing the smoke-box of the 10-comotive and forming an intermediate airreceiving chamber partly open atits front end and closed at its rear, pipes 13, leading from the rearend of the cylinder, opposite boxes secured to the sides of a fire-boxand communicating with the pipes, cylinders connecting the boxes withthe fire-box, and dia phragms mounted in the inner ends of thecylinders, substantially as specified.

4. The combination, with a locomotive the fire-box of which is providedwith an imperforate ash-pan, of a cylinder inclosing the smoke-box ofthe locomotive arranged eccentric therewith and having its front edgeprojecting beyond the same, and acurvcd rim for partially closing thespace between the cylinder and fire-box, and opposite pipes leading fromthe cylinder to the ash-pan, substantially as specified.

5. The combination, with the locomotive and its fire-box, of aconcentrically-arranged cylinder 9, inclosing the smoke-box of the 10-comotive and forming an intermediate airreceiving chamber partly open atits front end and closed at its rear, pipes 13, leading from the rearend of the cylinder, opposite boxes secured to the sides of a fire-boxand communicating with the pipes, and the imperforate ash-pan 4, havingcommunication with the pipes 13, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JOHN BURNS.

Witnesses:

MARGRET HAMMES, MARY A. OEHMEN.

